Piping Connection With Actuator
Single Acting Actuator
Series 185 and Series 285 single acting units are set to use OUT1 port. Therefore,
when using the single acting spring return actuator, OUT1 port should be connected
to the supply pressure port of the actuator.
Double Acting Actuator
For the Series 185 and 285 double acting types, OUT1 and OUT2 ports are used.
Power Connection
Terminal Connection of Current Input Signal
1. Open cover by loosening the four M4 bolts on positioner cover.
2. Loosen locking bolts of terminal plate.
3. Insert a cable through the cable connector in the positioner.
4. Use a ring type cable terminal so that it does not come out.
5. Insert terminal bolts in terminal holes of cable and lock them with (+) terminal and
(-) terminals on the terminal plate. Tighten terminal bolts with 1.1 lb-ft (15 kfgcm) of
torque.
6. Be sure not to change the polarity of the terminals.
Terminal Connection of Feedback Signal
1. Open cover by loosening the four M4 bolts on positioner cover.
2. Loosen locking bolts of terminal plate.
3. Insert a cable through the cable connector in the positioner.
4. Use a ring type cable terminal so that it does not come out.
5. Insert terminal bolts in terminal holes of cable and lock them with (+) terminal and
(-) terminals on the terminal plate. Tighten terminal bolts with 1.1 lb-ft (15 kfgcm) of
torque.
6. Be sure not to change the polarity of the terminals.
Inner Terminal Connection to Ground
1. The ground is necessary for the safety of the positioner and system.
2. The ground terminals are inside the terminal in the center of the terminal plate
and outside terminal beside outer cable entry. Use any ground terminal that is
available and resistance must be less than 100 Ω.
Ground Terminal Connection
3. For use with inside ground, open cover by loosening the four M4 bolts of
positioner cover.
4. In order to maintain the ground connection, use a ring type ground cable terminal
to prevent it from coming out.
Variable Orifice
Hunting can occur if the actuator volume is too small. In this case, adjust the
variable orifice using a (-) flathead screwdriver. Hunting is prevented by reducing
the flow rate of supply pressure transmitted to the actuator.
LCD SCREEN
SMART POSITIONER
LCD SCREEN
SMART POSITIONER
Piping Connection Example of Series 185 with Double Acting Actuator
Piping Connection Example of Series 285 with Double Acting Actuator
Terminal Plate of Series 185 and 285
Maximum Open
Minimum Open
1. Before connecting terminal, power must be shut off.
2. Use ring type terminal against oscillation, impact, etc.
3. Series 185 and 285 positioners use 4 to 20 mA DC for power. Minimum supply
current is 3.8 mA for all models. Maximum supply current must not exceed 24 mA.
4. In order to protect the Smart Positioner, the ground terminals should be
grounded.
5. Use twisted cable with conductor sectional area at least 0.0019 in
2
(1.25 mm
2
),
and suitable for 600 V as on conductor table of NEC Article 310. Outer diameter
of cable should be .25˝ to .39˝ (6.35 to 10 mm). Use shielded wire against
electromagnetic waves and noise.
6. Do not install the cable near equipment such as a high-capacity transformer or
motor.
CAUTION
